How do you differentiate between On Follow Up Date and Off Treatment Date?

How do you differentiate between On Follow Up Date and Off Treatment Date?

The  Off  Treatment  Date is the date the study subject stops the treatment phase of the protocol. They are not expected to receive any further interventions or enroll in other Treatment Arms. After an Off Treatment Date is added, the subject may move to Follow Up or Off Study.

IMPORTANT: For studies tracking subject visits in a study calendar, after the Off Treatment Date and/or On Follow-Up Date is added, you may not be able to complete visits from On Treatment phase of the protocol.